I have added more flowers and completely covered the background with washy color.  I know that if I want the light flowers to be the most important element, I have to get rid of the white in the background.  I am at a stopping place.  I will study the painting for awhile to decide how much detail I want in the secondary, background shapes of the leaves.  I like the back runs that create movement in the background.  The colors are looking pretty sweet to me at this point, so I will take that into consideration as I complete the painting.